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Asked: 2026-05-26T23:35:38+00:00

I want to do something like this: Any idea on how to achieve this

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I want to do something like this:

Rotation

Any idea on how to achieve this without changint the mass center

Thanks!

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1 Answer

  1. Editorial Team

    The simplest way would be to arrange the fixture so that it’s not centered on the body position. Eg. if you have this:

    myPolygonShape.SetAsBox( 5, 1 );

    you could use this instead:

    b2Vec2 offset(2.5, 0);
myPolygonShape.SetAsBox( 5, 1, offset, 0 );

    If you really need to keep your current arrangement of the fixture, you’ll need to calculate yourself where the new body position should be, and then use SetTransform to put it there.

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